Ac

I had driven my Tahoe about thirty miles and the air was working great, got home and parked it and heard a hissing noise coming from under the hood. I determined that it was coming from the passenger side. Today went to drive it and the ac was not blowing cold air, any ideas?

I had driven my Tahoe about thirty miles and the air was working great, got home and parked it and heard a hissing noise coming from under the hood. I determined that it was coming from the passenger side. Today went to drive it and the ac was not blowing cold air, any ideas?

there is a high pressure release valve for dumping pressures if too high could be it got stuck open. check for leaks use the UV dye in the R134 charging cans .

sometimes on shutdown it will hiss. high side pressure goes into the low side to equalize the system.

I found on the backside there is a plug or something that blew out is it replaceable?

I found on the backside there is a plug or something that blew out is it replaceable?

that maybe the safety valve . I think it is replaceable .. never had to replace one.

this is on the compressor ?

this it http://www.jegs.com/i/ACDelco/065/15-5904/10002/-1?CAWELAID=230006180002791555&CAGPSPN=pla&CAAGID=15769068431&CATCI=pla-193663207511&gclid=CNyY6LaEuM0CFdcagQodcBQMCg

Not sure if thats it or not havent seen it. I did find a part of an o-ring in the threads

Their is an electrical connector on the rear of the compressor any chance that it is leaking from there I found the vehicle harness dangling.